Our 30 x 40 6 Mil flat poly bags are super heavy weight plastic bags that provide protection for industrial parts and tools. Also great for use as freezer bags! All 30x40 6mil polybags are made from low density polyethylene and can be recycled. Our flat open top 30 x 40 .006 plastic bags feature impressive clarity and make storage and organization simple for industrial, food service and medical industry applications. These super heavy weight plastic lay flat 30 inch by 40 inch bags can be sealed by using twist ties, bag tape or by heat sealing, and they meed FDA requirements for use in food packaging and storage applications.